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From: Anson Huang <Anson.Huang@nxp.com>
To: robh+dt@kernel.org, mark.rutland@arm.com, shawnguo@kernel.org,
	s.hauer@pengutronix.de, kernel@pengutronix.de,
	festevam@gmail.com, l.stach@pengutronix.de, ccaione@baylibre.com,
	daniel.baluta@nxp.com, andrew.smirnov@gmail.com,
	abel.vesa@nxp.com, devicetree@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Cc: Linux-imx@nxp.com
Subject: [PATCH] arm64: dts: imx8mq-evk: VDD_ARM power rail is always ON
Date: Wed,  9 Oct 2019 15:04:19 +0800	[thread overview]
Message-ID: <1570604659-28314-1-git-send-email-Anson.Huang@nxp.com> (raw)

On i.MX8MQ EVK board, VDD_ARM is from a DC-DC converter which
is always ON, the GPIO1_IO13 is ONLY to switch VDD_ARM's voltage
between 0.9V and 1V for CPU DVFS, so VDD_ARM's GPIO regulator
should be always ON to avoid below confusion after kernel boot
up:

imx8mqevk login:
[   31.776619] vdd_arm: disabling

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
---
 arch/arm64/boot/dts/freescale/imx8mq-evk.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
index 6ede46f..4e0a281 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
@@ -48,6 +48,8 @@
 		gpios = <&gpio1 13 GPIO_ACTIVE_HIGH>;
 		states = <1000000 0x0
 			  900000 0x1>;
+		regulator-boot-on;
+		regulator-always-on;
 	};
 
 	wm8524: audio-codec {
-- 
2.7.4

WARNING: multiple messages have this Message-ID (diff)
From: Anson Huang <Anson.Huang@nxp.com>
To: robh+dt@kernel.org, mark.rutland@arm.com, shawnguo@kernel.org,
	s.hauer@pengutronix.de, kernel@pengutronix.de,
	festevam@gmail.com, l.stach@pengutronix.de, ccaione@baylibre.com,
	daniel.baluta@nxp.com, andrew.smirnov@gmail.com,
	abel.vesa@nxp.com, devicetree@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Cc: Linux-imx@nxp.com
Subject: [PATCH] arm64: dts: imx8mq-evk: VDD_ARM power rail is always ON
Date: Wed,  9 Oct 2019 15:04:19 +0800	[thread overview]
Message-ID: <1570604659-28314-1-git-send-email-Anson.Huang@nxp.com> (raw)

On i.MX8MQ EVK board, VDD_ARM is from a DC-DC converter which
is always ON, the GPIO1_IO13 is ONLY to switch VDD_ARM's voltage
between 0.9V and 1V for CPU DVFS, so VDD_ARM's GPIO regulator
should be always ON to avoid below confusion after kernel boot
up:

imx8mqevk login:
[   31.776619] vdd_arm: disabling

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
---
 arch/arm64/boot/dts/freescale/imx8mq-evk.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
index 6ede46f..4e0a281 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
@@ -48,6 +48,8 @@
 		gpios = <&gpio1 13 GPIO_ACTIVE_HIGH>;
 		states = <1000000 0x0
 			  900000 0x1>;
+		regulator-boot-on;
+		regulator-always-on;
 	};
 
 	wm8524: audio-codec {
-- 
2.7.4


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             reply	other threads:[~2019-10-09  7:04 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-09  7:04 Anson Huang [this message]
2019-10-09  7:04 ` [PATCH] arm64: dts: imx8mq-evk: VDD_ARM power rail is always ON Anson Huang
2019-10-25  6:04 ` Shawn Guo
2019-10-25  6:04   ` Shawn Guo

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